<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        html,body{
            height: 100%;
            background-color:cadetblue;
        }
        ul{
            list-style: none;
        }
    </style>
</head>
<body>
 
    <ul>
        <li>
           <input type="checkbox" id="check1">
           <label for="check1">
               <span class="iconfont"></span>
           </label> 
        </li>
    </ul>
</body>
</html>